Clearing Unread Messages in Yahoo Web Mail Client

I had a problem in my Yahoo mail inbox that it was showing 2 unread messages in my Inbox, even though I had read all of my messages.

I scrolled up and down, and could not find any unread messages.

I tried doing "Select All" and then "Mark All As Read", but still it showed those unread messages.

I solved the problem by clicking the selector in the upper right, just above the message list. I selected "Sort by unread" from the drop-down list. When I did that, sure enough my two unread messages came right up on the top of the list! I read the messages and... problem solved.

Then I clicked to change the setting back to "Date: Newest On Top".